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- What are the four requirements for chemical evolution, and why is each essential?What is the evolutionary history of life on Earth, and what are the major events and adaptations that have occurred?Based on their anatomical and behavioral differences, biologists previously placed humans and chimpanzees in different families, but now DNA sequence data suggest that they are closely related and should be placed in the same family. What are some advantages of using DNA sequences to decide how to classify organisms? What might be some disadvantages?
- 1. The taxonomic Supergroups of life are a work in progress which attempt to hypothesize on the relatedness of life's major groups. Currently this phylogeny includes a non-dichotomously branching clade with three different branches connecting to one node. The clade that includes all three branches emerging from the same node is known as A) homeoplasiac traits. B) polytomic lineages. C) paraphyletic clade. D) polyphyletic clade E) all of the aboveWhat evidence exists for the structure of the Tree of Life?How does evolution lead to both the diversity and the unity of life?